PlaqueFissureSignal électriqueHaut-parleurInterphoneSig nal sonorePeaud1d2KysteSonde463Chapitre 34 • Les signaux sonores: fréquence et utilisationS’informer avec les signaux sonores L’interphoneUtiliser un modèleTiphaine appelle Nawel avec un inter-phone. a. Quel dispositifcapte le signal so-nore lorsque Tiphaine parle?b. Quel type de signalparvient au haut-parleur ? c. Quel type de signal perçoit Nawel ?d. Représente la chaîne de transmission de l’interphone.

Which of the following statements are true of solids? a.the particles do not vibrate. b.the particles are in a fixed location. c.they have strong intermolecular forces between the atoms or molecules. d.the particles have less kinetic energy than those of liquids or gases.

Which lists the main components of darwin’s theory of evolution? a. random mutations drive evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms do not change. b. natural selection drives evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms change over time. c. natural selection drives evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms change over time. d. random mutations drive evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms do not change.

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final